Three-dimensional network of graphene grown with carbon nanotubes as carbon support for fuel cells

► A thermally reduced graphene oxide grown with CNT composite (G-CNT) was utilized as 3D highly conductive carbon scaffolds. ► The maximum current density for Pt/G-CNT was 23% higher than that of the commercial catalyst (E-TEK). ► The maximum power density value for Pt/G-CNT was 26% higher than that of E-TEK.